                 unmodified
                 root-is-head-root
                 {:head {:phrasal true
-                        :slash false}
-                 :slash false
+                        :synsem {:slash false}}
                  :rule "sentence-phrasal-head"
-                 :synsem {:cat :verb}})
+                 :synsem {:cat :verb
+                          :slash false}})
    
    (unify-check h21
                 root-is-head
                 {:rule "transitive-vp-nonphrasal-head"
-                 :slash false
                  :synsem {:aux false
+                          :slash false
                           :cat :verb}})
    (unify-check h21
                 root-is-head-root

          cat (atom :verb)
          second-arg (atom {:reflexive false})]
      {:phrasal true
       :slash true
       :synsem {:cat cat
                :subcat {:1 second-arg
                         :2 '()}}
       :comp {:synsem first-arg}

                 :head {:phrasal false
                        :phrasal-verb true}
                 :synsem {:aux false
                          :cat :verb
                          :slash false}})
   (unify-check h10
                {:head {:phrasal false
                        :synsem {:cat :sent-modifier}}
